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Make sure the answering system is ON.
Press and hold the DAY/CHECK button to set the day of the week.Press and hold the HOUR button to set the hour (a.m. or p.m.).Press and release the MIN button to advance the clock in one minute intervals. Press and hold to increase by 5-minute increments.After the time is set, the real time clock will be displayed on the handset within 1 minute.

NOTE: You must set the day manually. You may choose to set the time manually as well, although the time is automatically transmitted by your local phone company as part of Caller ID service. If you subscribe to Caller ID service, the current time is set automatically when you receive your first CID record.

Hi, what has happened is someone has sent you a message internally, the only way to clear this on the prostar DCS is to set one of your programmable softkeys to be a MSG key, then follow the prompts on the screen, you can then put the key back to what it was originally. I have put a video on to help you with the progamming of your keys on the prostar DCS, of which there are lots more on YouTube searching abbeytel. or please visit www.abbeytelecom.com for more tips and help. I hope that I have helped you.

Press the Transfer key
Prompt: ENTER PGM ID: Enter 200
Prompt: PASSCODE: Enter 1234
Display shows: DISABLE
Press 1 to change to ENABLE
Press the Speaker key
Enter 505
Current Date/Time shows in the format: WMMDDYY:HHMM
W=Week day where 1 = Monday, 2 = Tuesday etc.
HH = Hour in military format
Enter a new Date/Time in the same format. noce the last digit is pressed it will automatically save.
For example: 3102908:1645 is what you would enter for Wednesday, October 29th, 2008 @4:45pm.
Press the Transfer key to exit.

Press "clock" and hold for a few seconds.It will say the day. If the day is wrong, use the arrow keys to move either forward or backword through the week. When the day is set press "clock" again and you will hear the hour. Press the arrow keys to move the hours. Press again for the minutes and use the arrow keys to set the minutes. Last press "clock" again and set AM or PM. By the way, the manual does not tell you how to set the clock.

SET DATE AND TIME DISPLAY Should it become necessary to correct the date and time displayed on all of the keysets, due of time change (twice a year), you must first access the customer programs.To access customer programs, open system programming using the passcode you have been assigned. (Default passcode is 1234). You must use a (display phone) LCD 12B or LCD 24B keyset.ENABLE CUSTOMER PROGRAMMINGWhile on-hook, press TRSF and dial 200. he display shows.ENABLE CUS. PROG.PASSCODE:Dial the four digit passcode. The display shows:ENABLE CUS. PROG.DISABLEDial 1 or press the ▲ on the Volume to enable. The display shows:ENABLE CUS. PROG.ENABLEPress TRSF. The keyset returns to its idle condition.The display format is the following:W (Day of the week): Enter 0 for Sunday and 6 for Saturday.MM (Month): Enter 01 for January and 12 for December.DD (Day of the month): Enter a number in the range of 01-31YY (Year): Enter the last two digits of the year.HH (Hours): Use the 24 hour clock and enter a number in the range of 00-24.MM (Minutes): Enter a number in the range of 00-59.SETTING THE DATE AND TIME1. Press TRSF and then dial the 505. The display shows: OLD: 1102802:0852NEW: WMMDDYY:HHMM2. Enter the new time and date using the above format:OLD: 1102802:0852NEW: 1102802:07523. Verify the time and date and reenter them if necessaryOLD: 1102802:0752NEW: WMMDDYY:HHMM4. Press TRSF to store and exit programming.If you have entered invalid data, you will receive an [INVALID ENTRY] message for three seconds. Reenter the correct date and time. If the information you entered is incorrect, repeat steps 1 through 4.

First to change the clock to a 12 hour instead of a 24 hour requires a bit of CAUTION. You have to go into the technician level of programming so be careful. From a display phone, Press #, ( Programming ) is displayed, enter 20, ( MMC Disabled ) is displayed, enter password ( 1 2 3 4 is default ), enter function 4 for 12 hour clock, enter # to exit. If the time and date are displayed wrong you have to go to # 55 and reset time and date.
YY MM DD W HH MM format. W = Day of week with 1=Monday and HH MM must be entered in Military time even though you have a 12 hour clock set. Good Luck

Press "clock" and hold for a few seconds.It will say the day. If the
day is wrong, use the arrow keys to move either forward or backword
through the week. When the day is set press "clock" again and you will
hear the hour. Press the arrow keys to move the hours. Press again for
the minutes and use the arrow keys to set the minutes. Last press
"clock" again and set AM or PM. By the way, the manual does not tell
you how to set the clock.